import java.util.concurrent.atomic.AtomicInteger;

public class Demo1 {
    //private static int count = 0;
    private static AtomicInteger count = new AtomicInteger();

    public static void main(String[] args) throws InterruptedException {
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 5000; i++){
                count.getAndIncrement();  //count++
//              count.incrementAndGet();  //++count
//              count.decrementAndGet();  //count--
//              count.getAndDecrement();  //--count
//              count.getAndAdd(10);//count+=10
            }
        });
        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 5000; i++) {
                count.getAndIncrement();
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println(count);
    }
}
